Social presence in Web surveys. - Mick P. Couper; Roger Tourangeau; Darby M. Steiger (CHI, 2001)

Humanizing self-administered surveys: experiments on social presence in web and IVR surveys. - Roger Tourangeau; Mick P. Couper; Darby M. Steiger (Comput. Hum. Behav., 2003)

Impact of progress feedback on task completion: first impressions matter. - Frederick G. Conrad; Mick P. Couper; Roger Tourangeau; Andrey Peytchev (CHI Extended Abstracts, 2005)

The impact of progress indicators on task completion. - Frederick G. Conrad; Mick P. Couper; Roger Tourangeau; Andrey Peytchev (Interact. Comput., 2010)